Exposure to meth can cause brown trout to experience withdrawal symptoms, and can hinder a trout's ability to find food or a mate.
The Rodney Strong Vineyards reports that no one was hurt during the spill.
The storm has been linked to 45 deaths, while the damage caused is estimated to exceed $38 billion.
The country's Supreme Court scolded government agencies for failing to look after the World Heritage site.
The country's future depends on keeping the holy river alive.
The study identified households where sewage was being misdirected into waterways.